Pith Number

pith:TPGUJGCD

pith:2025:TPGUJGCDOV7BTQUPQOADMBUCR3

not attested not anchored not stored refs pending

A Melody in the Noise: Modeling Echoes of the Crab Nebula

Marten H. van Kerkwijk, Thierry Serafin Nadeau

arxiv:2507.23214 v2 · 2025-07-31 · astro-ph.HE

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TPGUJGCDOV7BTQUPQOADMBUCR3}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-27T01:04:49.588610Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9bcd449843757e19c28f83803606828ee024d2a4848c2246625d1bb340bf98d9

Aliases

arxiv: 2507.23214 · arxiv_version: 2507.23214v2 · doi: 10.48550/arxiv.2507.23214 · pith_short_12: TPGUJGCDOV7B · pith_short_16: TPGUJGCDOV7BTQUP · pith_short_8: TPGUJGCD

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/TPGUJGCDOV7BTQUPQOADMBUCR3 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 9bcd449843757e19c28f83803606828ee024d2a4848c2246625d1bb340bf98d9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7a8a44ebbaed0a47d2d8a03f652dceb0647afaae5bd925a75aed5bbf4db2b32b",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2025-07-31T03:09:31Z",
    "title_canon_sha256": "ce63b8f121de1be87a00ba56c33129d8b0bd51240a6682df9d0ccb3d17c4dafd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2507.23214",
    "kind": "arxiv",
    "version": 2
  }
}